Gas flow indicator



FIG. 1 is a front perspective view from above with piston retracted) of a gas flow indicator showing my new design;

FIG. 2 is a front perspective view from above (with piston extended) thereof;

FIG. 3 is a rear perspective view from below (with piston retracted) thereof;

FIG. 4 is a front view (with piston retracted) thereof;

FIG. 5 is a rear view (with piston extended) thereof;

FIG. 6 is a left side view (with piston retracted) thereof;

FIG. 7 is a right side view (with piston extended) thereof;

FIG. 8 is a plan view thereof; and,

FIG. 9 is an underneath view thereof.

The features shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a gas flow indicator, as shown and described. 